Import december-2020-12-18 from private repo (scrubbed 2026-05-27)

Targets Rec Room 2020.12.18 client.

Re-import after adding:
- DorkNet.ClientMod/dorknet-clientmod.json.template — config schema
  the launcher's manifest-driven patcher renders into UserData/.
- tools/build-patcher-zip.ps1 — produces the dorknet-clientpatch-{key}.zip
  Release asset the launcher fetches.
- .github/workflows/release.yml — auto-publishes both Release assets
  on v1-december-* tag push.

Scrubbed via maintainer-side scrub-for-public.ps1: same drop rules as
the prior import, plus build-patcher-zip.ps1 added to the tools/
allow-list so it survives the scrub.

DorkNet.Server/admin-ui/src/components/Empty.tsx

@@ -0,0 +1,19 @@
+// Tiny stand-in for "nothing matches your filter / nothing exists yet"
+// table-empty states. Centered, muted, optional CTA.
+
+interface Props {
+  title?: string;
+  blurb?: string;
+  cta?: React.ReactNode;
+  className?: string;
+}
+
+export function Empty({ title = 'Nothing here', blurb, cta, className }: Props) {
+  return (
+    <div className={`flex flex-col items-center justify-center gap-1 py-10 text-center ${className ?? ''}`}>
+      <div className="text-sm font-medium text-ink-200">{title}</div>
+      {blurb && <div className="text-xs text-ink-400 max-w-xs">{blurb}</div>}
+      {cta && <div className="mt-3">{cta}</div>}
+    </div>
+  );
+}